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Participate in expert physics discussion. Discussion on the nature and properties of matter and energy. This area is for topics that don't fit the other categories. Mainstream physics only.
Graduate What is the size of a point? Or, what is a particle?
  • seerongo
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High School Doppler Effect: How Does the Ambulance Siren Vary?
  • annatar
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Undergrad Why Does the Newfound Planet WASP-17 Orbit Backward?
  • Evo
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Graduate From Cat Paradox to Multiple Worlds: What Gives?
  • kote
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High School What is the difference between laminar and turbulent flow?
  • 101nancyma
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Undergrad Which branch of physics is the most fundamental one?
  • Rika
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Undergrad Are Physics Formulas Always Approximations?
  • RocketInquiry
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Not sure if this belongs here, but if someone would be kind enough
  • hisoko
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Undergrad Packing Fraction of Cylinders - Answers to Your Questions
  • marmot
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Graduate Bob Jones University (BS in Physics)
  • vociferous
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Glue a thin sheet of copper to a cork?
  • jeff1evesque
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Graduate What is delta-correlated Gaussian noise?
  • Apteronotus
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Graduate Where are the velocity extremes in a radial gravitational field?
  • Calluin
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High School Dying from rapid depressurization- possible?
  • Suzukigold
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High School Why everything is shaped like a circle?
  • blossom
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Undergrad Combining two decibel values vs dissimilar values
  • Alexander100
  • · Replies 11 ·
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Where Can I Download Free Science Books?
  • smallphi
  • · Replies 31 ·
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Graduate Paradox which questions time travel to the future
  • The Hater
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Why does Physics attract crackpots?
  • DrummingAtom
  • · Replies 63 ·
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Can Teleportation Solve Our Environmental Problems?
  • Rhine720
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High School Antimatter Bomb: Real or Fiction?
  • hagopbul
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High School Explain the 90 degree rule in Billiards
  • stephie123
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Undergrad Can Anything Float in a Superfluid?
  • Edi
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Graduate How was transparent aluminum created using high power X-ray sources?
  • fourier jr
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High School What exactly is a wave? What is it made out of?
  • DARTZ
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High School Plumbob creating designs in sand?
  • beaverflutes
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Graduate Anomalies in the Asymmetrical Capacitors for Propulsion Tests
  • Bobbox1980
  • · Replies 2 ·
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Time Travelling-Very Intereting Conversation
  • Awsom Guy
  • · Replies 3 ·
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Graduate Wave Propagation in Discreate Mediums - Help Needed
  • sadhu
  • · Replies 11 ·
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High School Strange Radio Reception from TV Speakers: Possible Causes and Solutions
  • Chris28
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  • Poll Poll
StackOverflow equivalent for physics?
  • diazona
  • · Replies 3 ·
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Undergrad Sonar & Wave Qs: High-Freq Signals, Resolution & Feasibility
  • adam84
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High School Can the other two cameras provide a better pictuer?
  • Max CR
  • · Replies 18 ·
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Undergrad Will Two Identical Spherical Cavities in Free Space Attract or Repel Each Other?
  • zd1899
  • · Replies 19 ·
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Help prove something mathematically
  • Daisuke
  • · Replies 1 ·
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High School Mystery Spot illusion explanation
  • jobyts
  • · Replies 7 ·
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Top physicists of all time with respect to h-index
  • maverick_starstrider
  • · Replies 7 ·
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High School Does the heart pumping and movement of blood affect body weight?
  • ATPenergy
  • · Replies 9 ·
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Undergrad History of Physics: Newton or Later Development?
  • i_island0
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Graduate Resonant Frequencies of Coaxial Cylinders
  • DRossman2
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Undergrad What Are the Key Principles Behind the Design of the Bourdon Gauge?
  • Nauhaie
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What is the Brilouine Zone and where can I learn more about it?
  • eyalshap
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High School Why are there so many different symbols for scientific equations?
  • Hawkingswnabe
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Undergrad Can a nuke crush a volcano's slope?
  • SizarieldoR
  • · Replies 10 ·
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High School What Are the Four Fundamental Forces of Nature?
  • seasnake
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Physics Research Report: Ugh, No One Would Care Anyway
  • Redbelly98
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Undergrad Why is the concept of amount of substance as a quantity confusing?
  • adityatandon
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Undergrad A: "Transforming Coal into Diamond: How Much Does One Pound of Gold Compress?"
  • chicopee
  • · Replies 12 ·
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Make Explosive: Best Cheap Recipe for Power
  • dangerbird
  • · Replies 4 ·
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  • Poll Poll
High School Energy Efficiency: Email vs Letter
  • 337
  • · Replies 29 ·
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Pictures show soap bubble bursting
  • Greg Bernhardt
  • · Replies 8 ·
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Graduate Unscientific friends making arguments
  • craig1928
  • · Replies 19 ·
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Graduate I'm looking for a solid concise way to
  • Rants
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Undergrad Eliminating noise from Excel Data
  • Gmoney2487
  • · Replies 14 ·
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Undergrad Calculating Video Recording Capability of 4500 ft Object w/ Camcorder
  • Max CR
  • · Replies 16 ·
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High School Explaining the Physics Principle of Vortex Coolers
  • pixel01
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TEW: Lewis Little's Theory of Elementary Waves
  • Rakavolver
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Undergrad Optical-SETI Anomaly: Australian Astronomers Detect Unusual Signal
  • Ivan Seeking
  • · Replies 7 ·
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Science is great E=mc^(2a+5a-5a+3-2+5-4-2a-2)
  • jhooper3581
  • · Replies 13 ·
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Undergrad Flags Flutter: Aerodynamics Explained
  • pras_quantum
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Graduate Air vibrating in a cylindrical cavity
  • PH7SICS
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High School What Is the General Equation of a Parabola and Its Derivation?
  • DJ24
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Physics Forums ratings killed every new year
  • Pupil
  • · Replies 22 ·
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Undergrad Why Does the Gravity Field Exist?
  • cartuz
  • · Replies 19 ·
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High School Become Smarter - Tips for Struggling with Trig & Physics
  • lola.bonane
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High School Does a Fly Crash Into the Windshield When a Car Suddenly Stops?
  • livingsacred
  • · Replies 54 ·
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Graduate How Do Scientists Approach the Challenges of the Standard Model?
  • earamsey
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Undergrad Parker 61 Fountain Pen: Understand Its Capillary Action
  • physicsisphirst
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Graduate Does the Belousov-Zhabotinsky Reaction Lead to a Steady State or Oscillations?
  • Llewlyn
  • · Replies 3 ·
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3
  • Poll Poll
Order or Entropy?
  • Loren Booda
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High School Is There a Way to Convert Mass into Charge?
  • anson
  • · Replies 6 ·
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Undergrad Gravitational pull at the center of the Earth
  • Secant
  • · Replies 34 ·
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High School Color of Clouds: Dark Pink at Night, White in Morning?
  • yash25
  • · Replies 16 ·
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Undergrad Interesting comment about medical research vs. physics research
  • bobaustin
  • · Replies 3 ·
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Graduate What does it mean to say that two things are coupled or not decoupled ?
  • AxiomOfChoice
  • · Replies 1 ·
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High School Longitude and Latitude angle at 12M
  • Philosophaie
  • · Replies 5 ·
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Undergrad Searching for Phrases: How to Avoid Keywords
  • jason12345
  • · Replies 7 ·
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Undergrad Behavior of Aurora Australis Around A Dark Spot on Composite Image
  • Kingarthur
  • · Replies 1 ·
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High School Increase FOV of Camera: Simple Tips & Tricks
  • 0207
  • · Replies 1 ·
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Undergrad Mad About Physics: Examining Braintwister No. 90 - The Three Hole Can
  • TVP45
  • · Replies 16 ·
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Undergrad Calculating Flow Separation Point
  • no1schuifan
  • · Replies 3 ·
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High School Noises from MRI Imaging: Sources Explained
  • Lisa!
  • · Replies 11 ·
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Graduate LHC Restart in Sept - How Long Before We Get Results?
  • Pupil
  • · Replies 17 ·
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High School What is Mersenne's Law and its connection to Pythagoras?
  • SkyeLilly
  • · Replies 3 ·
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Incredible Power of Oil: Stick Diamonds to Windows!
  • katchum
  • · Replies 2 ·
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High School Uncovering the Truth: Is Wind Energy Really Free or Does it Have Hidden Costs?
  • northern expo
  • · Replies 19 ·
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High School Is Magnetic Propulsion the Key to Space Travel?
  • joe dirt
  • · Replies 3 ·
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Undergrad Physics in Movies: Realism vs. Entertainment
  • EnumaElish
  • · Replies 54 ·
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High School What Defines East & West if Earth Stops Rotating?
  • cepheid
  • · Replies 9 ·
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High School Energy and Matter and Everything else
  • Swapnil
  • · Replies 6 ·
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High School Home-Made Energy: Exercise Bike for TV?
  • budd
  • · Replies 13 ·
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Highest Resolution Modern Microscope - Info & Resources
  • KFC
  • · Replies 1 ·
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Graduate Most Mind Blowing Physics statements
  • um0123
  • · Replies 31 ·
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IQ of a Physicist and Other Related Fields
  • T.O.E Dream
  • · Replies 42 ·
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High School Is flame matter or energy?
  • ShadowDatsas
  • · Replies 2 ·
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Is Sixty Symbols Effective for Physics Outreach?
  • coffeem
  • · Replies 4 ·
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High School How Do You Convert Mmscmd to Mmbtu?
  • amanj86
  • · Replies 5 ·
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Undergrad What is the potential for using a conductive flame in audio technology?
  • jmatejka
  • · Replies 4 ·
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High School How to write uncertainities on different measurement
  • Awsom Guy
  • · Replies 7 ·
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High School Helium Inhalation: Mythbusters Video Explained
  • leroyjenkens
  • · Replies 23 ·
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